"E:Unable to mount '/emmc'" for example.
so i think i need a .zip what i can use with the original recovery, like this one from fuser-invent rom. i think this can help me out.
If you can boot into recovery and flash files you can just flash the build.prop to your device. Grab my Nexus 7 or Samsung fingerprint and flash that. All it does is replace the build.prop with mine. Mine is not the stock build.prop though, it's got the change for the fingerprint and some additional tweaks. If you really want to flash the stock build.prop back then give me your device build date and what firmware version you had on it. I will make you a flashable zip and link you to it. I'm unsure whether it will flash well in TWRP though, since they are built to flash in the stock recovery. You could probably extract the stock recovery files and place them on your external SD card to use the stock recovery instead.